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BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer

write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0:
 tick_sched_do_timer+0xb4/0xd0 kernel/time/tick-sched.c:141
 tick_sched_timer+0x3f/0xd0 kernel/time/tick-sched.c:1313
 __run_hrtimer kernel/time/hrtimer.c:1520 [inline]
 __hrtimer_run_queues+0x271/0x600 kernel/time/hrtimer.c:1584
 hrtimer_interrupt+0x226/0x490 kernel/time/hrtimer.c:1646
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline]
 smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829
 __read_once_size include/linux/compiler.h:232 [inline]
 check_kcov_mode kernel/kcov.c:155 [inline]
 __sanitizer_cov_trace_pc+0x22/0x50 kernel/kcov.c:187
 __this_cpu_preempt_check+0x3c/0x130 lib/smp_processor_id.c:52
 xt_write_recseq_end include/linux/netfilter/x_tables.h:396 [inline]
 ipt_do_table+0x8b1/0xe70 net/ipv4/netfilter/ip_tables.c:357
 iptable_filter_hook+0x44/0x60 net/ipv4/netfilter/iptable_filter.c:37
 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline]
 nf_hook_slow+0x7c/0x160 net/netfilter/core.c:512
 nf_hook include/linux/netfilter.h:262 [inline]
 __ip_local_out+0x1f3/0x2b0 net/ipv4/ip_output.c:114
 ip_local_out+0x2d/0x90 net/ipv4/ip_output.c:123
 __ip_queue_xmit+0x3a6/0xa40 net/ipv4/ip_output.c:530
 ip_queue_xmit+0x3e/0x50 include/net/ip.h:237
 __tcp_transmit_skb+0xe0c/0x1d80 net/ipv4/tcp_output.c:1238
 __tcp_send_ack+0x22c/0x2f0 net/ipv4/tcp_output.c:3779
 tcp_send_ack+0x2d/0x40 net/ipv4/tcp_output.c:3785
 tcp_cleanup_rbuf+0x124/0x340 net/ipv4/tcp.c:1575
 tcp_recvmsg+0x686/0x1ba0 net/ipv4/tcp.c:2183
 inet_recvmsg+0xc1/0x250 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:886 [inline]
 sock_recvmsg net/socket.c:904 [inline]
 sock_recvmsg+0x8e/0xb0 net/socket.c:900
 sock_read_iter+0x185/0x230 net/socket.c:982
 call_read_iter include/linux/fs.h:1901 [inline]
 new_sync_read+0x416/0x450 fs/read_write.c:415
 __vfs_read+0x9e/0xb0 fs/read_write.c:428
 vfs_read fs/read_write.c:462 [inline]
 vfs_read+0x13e/0x2b0 fs/read_write.c:447
 ksys_read+0x16a/0x1a0 fs/read_write.c:588
 __do_sys_read fs/read_write.c:598 [inline]
 __se_sys_read fs/read_write.c:596 [inline]
 __x64_sys_read+0x49/0x60 fs/read_write.c:596
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1:
 tick_nohz_stop_tick kernel/time/tick-sched.c:780 [inline]
 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:973 [inline]
 tick_nohz_idle_stop_tick+0x191/0x680 kernel/time/tick-sched.c:994
 cpuidle_idle_call kernel/sched/idle.c:151 [inline]
 do_idle+0x1ad/0x290 kernel/sched/idle.c:269
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361
 start_secondary+0x169/0x1b0 arch/x86/kernel/smpboot.c:268
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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